CN102955165A - Method for compensating X and gamma energy response of ionization chamber by aluminum material - Google Patents
Method for compensating X and gamma energy response of ionization chamber by aluminum material Download PDFInfo
- Publication number
- CN102955165A CN102955165A CN2011102388003A CN201110238800A CN102955165A CN 102955165 A CN102955165 A CN 102955165A CN 2011102388003 A CN2011102388003 A CN 2011102388003A CN 201110238800 A CN201110238800 A CN 201110238800A CN 102955165 A CN102955165 A CN 102955165A
- Authority
- CN
- China
- Prior art keywords
- ionization chamber
- response
- gamma
- energy
- ray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000010935 stainless steel Substances 0.000 claims abstract description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 18
- 239000004411 aluminium Substances 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 230000005251 gamma ray Effects 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention relates to designing technology of ionization chambers, in particular to a method for compensating X and gamma energy response of an ionization chamber by an aluminum material. On the premise that a collection electrode in the ionization chamber is made of the aluminum material and a high-voltage electrode is made of a stainless steel material, an aluminum lining layer is arranged on the inner surface of the high-voltage electrode. By adding a certain thickness of the aluminum material on the inner surface of the steel high-voltage electrode, the problem about over response of the steel ionization chamber to X-ray and gamma-ray within the energy range from 100 to 200keV is solved, meanwhile, change of response to the X-ray and gamma-ray with energy higher than 300keV is small, and effect to a response curve of the X-ray and gamma-ray with flattening energy ranging from 0.08-7.0MeV is obvious.
Description
Technical field
The present invention relates to the ionization chamber designing technique of dosimeter, be specifically related to a kind of method of utilizing aluminum to carry out ionization chamber X, gamma energy response compensation.
Background technology
When carrying out the measurement of X, γ radiation dose, the locular wall material of ionization chamber can be non-air-equivalent material.Consider the combination property requirement of ionization chamber, such as mechanical property, welded seal, protection against the tide, corrosion resistivity and processing technology etc., locular wall (high-pressure stage and collector) is generally chosen the high duty alloy Steel material.For radiation protection with X, γ radiation dose and dose rate instrument, concerned countries standard-required: X, the response of γ emittance in 0.08～1.5MeV scope, must
137Cs response ± 30% in.And generally there was response problem in the steel ionization chamber to X, gamma-emitting response in 100～200keV energy range, need to carry out the compensation of energy response.During the energy response of compensated ionization chamber, pasting tin material with thickness according to a certain percentage at the ionization chamber outside surface is common method.The method of pasting tin is exactly to utilize tin material low energy X, gamma-ray attenuation to be forced down the response of crossing of 100～200keV energy range.And the energy of γ ray of surveying when ionization chamber is when 3MeV is above, and the compensation effect that pastes tin is not very desirable.
Summary of the invention
The object of the invention is to for the steel ionization chamber X, gamma-emitting response, need to carry out the problem of energy response compensation, a kind of method of utilizing aluminum to carry out ionization chamber X, gamma energy response compensation is provided.
Technical scheme of the present invention is as follows: a kind of method of utilizing aluminum to carry out ionization chamber X, gamma energy response compensation, the collection of described ionization chamber is aluminium material very, high pressure is stainless steel very, high-pressure stage is provided with stainless steel screen outward and covers shell, wherein, the inside surface at the stainless steel high-pressure stage arranges one deck aluminium matter lining.
Further, the aforesaid method of utilizing aluminum to carry out ionization chamber X, gamma energy response compensation, wherein, the gross thickness of stainless steel high-pressure stage and screening can should be no more than 2mm on the basis that guarantees ionization chamber impermeability and mechanical property.
Further, the aforesaid method of utilizing aluminum to carry out ionization chamber X, gamma energy response compensation, wherein, the thickness of the aluminium matter lining of high-pressure stage inside surface is 0.2mm～3mm.
Beneficial effect of the present invention is as follows: the present invention is by the suitable aluminum that adds thickness at steel high-pressure stage inner surface lining, solved the steel ionization chamber to X, the gamma-ray response problem of crossing in 100～200keV energy range, simultaneously, energy is higher than the variation of X, gamma-rays response of 300keV and little, has a significant effect for flattening energy X, gamma-ray response curve in 0.08～7.0MeV scope.
Description of drawings
Fig. 1 is the principle assumption diagram of the present invention's specific implementation in the columnar ionization chamber;
Fig. 2 is for using the calculated curve figure of columnar ionization of the present invention chamber energy response.
Embodiment
Below in conjunction with accompanying drawing and implementation process the present invention is described in detail.
The present invention utilizes aluminum to flatten the steel ionization chamber to X, gamma-emitting response in 0.08～7.0MeV energy range, make its
137Cs response ± 30% in.Ionization chamber is collected very aluminium material, high pressure is stainless steel very, high-pressure stage is provided with stainless steel screen outward and covers shell, at the inside surface of stainless steel high-pressure stage one deck aluminium matter lining is set, and crosses response problem thereby can optimize well ionization chamber in 100～200keV energy range.
Working gas in the ionization chamber sensitive volume mainly comes from the contribution of the electronic secondary of ray and locular wall material interaction generation to X, gamma-ray response.And locular wall also has attenuation to X, gamma-rays to responding the contributive while.Attenuation is particularly evident to the ray that energy is lower than 200keV.Therefore, appropriate design locular wall material and thickness can be optimized the energy response of ionization chamber.The method of pasting tin in the prior art utilizes tin material to low energy X, gamma-ray attenuation exactly.Equally, also can flatten by the method that reduces locular wall response contribution and can ring curve.
The key that flattening steel ionization chamber can ring curve is to reduce when responding in 100～200keV energy range, guarantees that 80keV energy place is unlikely to owe response.Because it is very short that energy is lower than the range of β particle in steel of 200keV, is micron dimension; So at low energy region (below the 200keV), the ionization chamber locular wall mainly comes from the layer material of close sensitive volume to the contribution of response.And be that the form of the interaction of photon with materials of 100～200keV is mainly photoelectric effect and Compton effect for energy, its reaction cross-section is proportional to respectively Z
5And Z.Therefore, atomic number is lining in the inside surface of ionization chamber high-pressure stage less than the material of Fe, can reduces photon and the interactional probability of its generation, thereby solve the steel ionization chamber to X, the gamma-ray response problem of crossing in 100～200keV energy range.Consider that from physics, chemical property and the technological angle of material in the element of atomic number less than Fe, aluminum is one of more satisfactory selection again.Meanwhile, iron and aluminium are higher than the difference of mass transfer coefficient of narrow beam photon of 300keV to energy little, so behind the aluminum that it is suitable that the inner surface lining of steel high-pressure stage adds thickness, ionization chamber is higher than the variation of X, gamma-rays response of 300keV and little to energy.In sum, ionization chamber collector material selection aluminium, stainless steel high-pressure stage inside surface also serves as a contrast the suitable aluminum that adds thickness, and the gross thickness of stainless steel high-pressure stage and screening can is also suitable, is effectively for flattening energy X, gamma-ray response curve in 0.08～7.0MeV scope.
In order to satisfy the requirement of energy response, the gross thickness of described stainless steel high-pressure stage and screening can should be no more than on the basis that guarantees ionization chamber impermeability and mechanical property etc. 2mm (in gross thickness one regularly, high-pressure stage and screening can separately the variation of thickness on ringing almost without affecting); Collector adopts aluminum, and its thickness is little on the impact of energy response, as long as satisfy other performance requirements; The thickness of the aluminium matter lining of high-pressure stage inside surface considers to need only 0.2mm～3mm from the energy response angle, and concrete thickness can be decided according to physical condition, such as 0.2mm, 1mm, 2mm, 3mm.Can there be the gap between liner aluminium lamination and the stainless steel layer.
Take the columnar ionization chamber as example, as shown in Figure 1, comprise stainless steel shielding shell 1, be stainless steel high-pressure stage 2 in the shield shell 1, the centre is the collector 4 of ionization chamber, and the collector 4 of ionization chamber is aluminium material, and the gross thickness of shield shell 1 and high-pressure stage 2 is 2mm, and the inner surface lining at high-pressure stage 2 adds the thick aluminium lamination of one deck 2mm 3, calculate ionization chamber energy response curve (
137The Cs normalizing) as shown in Figure 2.As shown in Figure 2, adopt this design after, can realize: X, gamma-emitting response exist in 0.08～7.0MeV scope
137Cs response ± 20% in.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technology thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (3)
1. method of utilizing aluminum to carry out ionization chamber X, gamma energy response compensation, the collector of described ionization chamber (4) is aluminium material, high-pressure stage (2) is stainless steel, be provided with stainless steel screen outside the high-pressure stage (2) and cover shell (1), it is characterized in that: the inside surface at stainless steel high-pressure stage (2) arranges one deck aluminium matter lining (3).
2. the method for utilizing aluminum to carry out ionization chamber X, gamma energy response compensation as claimed in claim 1, it is characterized in that: the gross thickness of stainless steel high-pressure stage (2) and screening can (1) should be no more than 2mm on the basis of assurance ionization chamber impermeability and mechanical property.
3. the method for utilizing aluminum to carry out ionization chamber X, gamma energy response compensation as claimed in claim 1 or 2, it is characterized in that: the thickness of the aluminium matter lining (3) of high-pressure stage inside surface is 0.2mm～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102388003A CN102955165A (en) | 2011-08-19 | 2011-08-19 | Method for compensating X and gamma energy response of ionization chamber by aluminum material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102388003A CN102955165A (en) | 2011-08-19 | 2011-08-19 | Method for compensating X and gamma energy response of ionization chamber by aluminum material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102955165A true CN102955165A (en) | 2013-03-06 |
Family
ID=47764213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102388003A Pending CN102955165A (en) | 2011-08-19 | 2011-08-19 | Method for compensating X and gamma energy response of ionization chamber by aluminum material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102955165A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472476A (en) * | 2013-09-16 | 2013-12-25 | 中国船舶重工集团公司第七一九研究所 | Detector for monitoring environmental radiation dose rate |
| CN108152853A (en) * | 2018-03-08 | 2018-06-12 | 北京聚合信机电有限公司 | Counting tube energy compensation system |
| CN109011212A (en) * | 2018-08-07 | 2018-12-18 | 中国原子能科学研究院 | Wide for medical accelerator can atmospheric air ionisation chamber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4300050A (en) * | 1979-03-12 | 1981-11-10 | Osterreichisches Forschungszentrum Seibersdorf Gmbh | Secondary-standard ionization chamber, in particular for measuring the energy dose |
| CN86209740U (en) * | 1986-12-06 | 1987-09-02 | 核工业部第七研究所 | High voltage ionization chamber with energy compensation |
| GB2246235A (en) * | 1990-04-17 | 1992-01-22 | Oesterr Forsch Seibersdorf | Secondary standard ionization chamber for measuring photon radiation |
| CN201117620Y (en) * | 2007-11-05 | 2008-09-17 | 中国辐射防护研究院 | Nested structure ionization chamber |
-
2011
- 2011-08-19 CN CN2011102388003A patent/CN102955165A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4300050A (en) * | 1979-03-12 | 1981-11-10 | Osterreichisches Forschungszentrum Seibersdorf Gmbh | Secondary-standard ionization chamber, in particular for measuring the energy dose |
| CN86209740U (en) * | 1986-12-06 | 1987-09-02 | 核工业部第七研究所 | High voltage ionization chamber with energy compensation |
| GB2246235A (en) * | 1990-04-17 | 1992-01-22 | Oesterr Forsch Seibersdorf | Secondary standard ionization chamber for measuring photon radiation |
| CN201117620Y (en) * | 2007-11-05 | 2008-09-17 | 中国辐射防护研究院 | Nested structure ionization chamber |
Non-Patent Citations (1)
| Title |
|---|
| 孙光智等: "核电站事故后监测电离室的设计方法", 《舰船科学技术》, vol. 33, no. 8, 15 August 2011 (2011-08-15) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472476A (en) * | 2013-09-16 | 2013-12-25 | 中国船舶重工集团公司第七一九研究所 | Detector for monitoring environmental radiation dose rate |
| CN108152853A (en) * | 2018-03-08 | 2018-06-12 | 北京聚合信机电有限公司 | Counting tube energy compensation system |
| CN109011212A (en) * | 2018-08-07 | 2018-12-18 | 中国原子能科学研究院 | Wide for medical accelerator can atmospheric air ionisation chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Boulay et al. | DEAP-3600 dark matter search at SNOLAB | |
| CN105803267A (en) | Aluminium-based composite material used for nuclear reactors to shield neutrons and gamma rays as well as preparation method thereof | |
| CN102565846A (en) | Honeycomb-type thermal neutron detector | |
| Nelson et al. | Investigation of a lithium foil multi-wire proportional counter for potential 3He replacement | |
| CN102955165A (en) | Method for compensating X and gamma energy response of ionization chamber by aluminum material | |
| CN104319222A (en) | Standard high-pressure ionization chamber and manufacturing method thereof | |
| Singh et al. | Background rejection of TEXONO experiment to explore the sub-keV energy region with HPGe detector | |
| Cline et al. | Status of Zeplin II and Zeplin IV study | |
| CN102955166A (en) | Method for ionization chamber X, gamma energy response compensation by using titanium material | |
| CN103185892A (en) | Method for ionization chamber X and gamma energy response compensation through nylon material | |
| CN101526623B (en) | High-energy X-ray industrial CT ionization detector | |
| CN103832599A (en) | Composite shielding method for satellite to resist total dose effect | |
| CN202770736U (en) | Real-time detecting device for pulverized coal deposition working conditions in pneumatic delivery pipeline | |
| Yi et al. | A prototype of a high rating MRPC | |
| CN104916512A (en) | Air flat-plate ionization chamber and dosimeter with ionization chamber | |
| CN106409374B (en) | Electric field separates ionize charge type nuclear battery | |
| JP2006194625A (en) | Neutron detector | |
| CN208384129U (en) | A kind of Flouride-resistani acid phesphatase hyperbar honeycomb grid ionization chamber | |
| CN204204794U (en) | A kind of standard type high-pressure ionization chamber | |
| RU2377610C1 (en) | Method of gamma-ray logging wells (versions) | |
| CN1940597A (en) | Fusion neutron flux monitor | |
| Jing et al. | Radiation-resistant materials in space and their reliability evaluation technology: A review | |
| Yurkov et al. | Neutron and hard X-ray pulses of the plasma focus chamber at discharge currents of 100–200 kA | |
| CN202614948U (en) | Honeycomb-type thermal neutron detector | |
| Nelson et al. | Investigation of aerogel, saturated foam, and foil for thermal neutron detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130306 |